Cooling system



Sept. 6, 1932. J` B, FlsHER 1,875,580

COOLING SYSTEM Filed- Oct. 19, 1928 Patented Sept. 6, 1932 i vUNITED STATES JAMES B. FISHER, OFWAUKESHA, WISCONSIN, `ASSIGNOR ro WAIINESHA,` MOTOR coin-` rvPANY, OFSWIVIUKESHA, WISCONSINACORPORATION or WISCONSIN COOLING SYSTEM 'j `f This invention relates to internal combustion engines, and more particularly to means for cooling the cylindervvallsof such engines,

The primary object of my invention is'to ".5 maintain a uniform supply of cooling Water toeach cylinder or group of cylinders `of a multicylinder engine.' This condition isnot always obtained in common practice Where it is customary to use a single-pump `discharging into a branched pipe, A'one branch leading to each cylinder orgroup of cylinders. .It has been found that with this construction, under certain conditions, there is great in-` equality of iiow through the various branches. This is due to the fact that theipathV through any one branch is sufficiently unrestricted to take the full discharge of the pump Without any great pressure beingbuilt upat the junction of the various branches. i j, l j.

If a Steam pocket starts toform ina cylinf der,it displaces Water and thereby increases the resistance toV flow through this cylinder,- This slight increase is suflicient to divert the fioW to the other cylinder or cylinders. This reduction of flow through the first cylinder reduces the cooling and further aids the formation of thesteain pocket With resulting inf crease in pressure and yreduced `lioW.v ,This condition usually occurs in a spasmodic man? ner, first in one cylinder and then in another, jumping from one to the other for no apparent reason. j y l When the engine is operated in an inclined position, as is necessary in Suchmachinery as tractors and logging machinery, Where angles of forty-five degrees are not unusual, there is a very definite tendency to inequality of'distribution betweenthe high and'l'ovv end of the engine. l j

The difficulties described above are effectively overcome by a pump which has a series of impellers discharging to independentipipes leading to individual cylinders or groups of cylinders. In this Way the full pump pressure is always available to force coolingwater through each cylinder jacket regardless ofthe conditions within the jacket or the `conditions of engine tilting. j

In its broader aspects, my invention comprehends means for supplying cooling Water Appneation medoefober i9, 192s. l`hserial. No. 313,409.

to' the; cylinders of an vinternal combustion engineat a plurality of points or Zones, the;

supply .of Waterxbeing under pressure at Y each pointor Zone independently of the Water supplied` at theother points or zones.

this .means .the temperature ofthe cyl? inders may be lmaintained substantially con# stant and at a proper value to assure maximum `efficiencyfinoperation of the engine.

Further objects and advantages'of my inven# tion Will appear from thedetailed descrip-v tion. v

. In Vthe drawing Y AFig. 1 is a sidefview of an internal combustion .engine of knowntype, and'its asso` ciated radiator, illustrating my invention; as applied thereto; Y j f `Fig. 2 is a View similar to Fig. 1 showing a different form of the invention; 4 f

Fig. 3 is avertical sectional view through the pump assembly taken in the direction of the [axis thereof, parts being shown ineleva-` tion; and i "Fig Lisa section taken substantially on j' In Fig. 1 ofthe drawing I haveillustrated my invention as appliedto an internal combustion engine E of known type, this engine" having four cylinders arranged in pairs, each pair of .cylinders 1 being 'disposed Within `a Water jacket 2 which provides aA Water space 3 about each cylinder. The head of the cyll inder is carriedbyv engine head 4 Which is secured to thecylinder block in a` known manner. j The Water jackets 2 are connected by a Water' return pipe 5 anda hose section 6 to a radiator 7 of known type, adjacent the top thereof. j j v j The lower portion or hot Well of the radiator Tris connected by hose section 8 to an ;V

the inner side ofthe central casing 1S and the to the upper portion of the pump assembly and is provided with two parallel passages which open into water supply pipes 17 the discharge ends of whichr are secured to the water jackets 2 and open into the same, in a known manner. The connector 16 is thus of substantially Y -shape and the pipesy 17'communicate with the discharge openings of the respective pumps 10.

plied to the other jacket or vjackets so that' propersupply vand circulation of cooling water in each of the water jackets is assured. In this manner, I supply cooling water to the water jackets at substantially uniform pressure with the `result that proper circulation of the water at all points in thewater acket is assured and overheating of the cylinders is prevented, assuring maximum efficiency in operation of the engine.

In the form illustrated in Fig. 2, I'have shown an engine E in which all of the cylinders 1a are disposed in 'a' common water jacket 2a providing, with the cylinder walls, water space 3a. The engine head la is provided with a plurality of water outlets connected by the water return pipe 505 and hose section 6a to radiator 7. The lower'portion of the radiator-is connected by a hose section 8a to a water inlet pipe 9a, the upper end portion of whichis extended laterally to pro duce, in effect, a nozzle 9b which is suitably secured to a pump assembly 10b. This pump assembly is illustrated in Figs. 3 and 4 and includes three pump casings 18 which are sel cured together in abutting relation in a suit able manner, these casings being separated from each other bycircular plates or disks 19 and 20.

The disk 19 is set into a suitable rabbet in disk 2O is integral with this central. casing and'forms the-outer side or head thereof. Each of the casings is provided, at its upper portion, with an outlet neck 21 and a threearmed head 22 seats upon and is suitably secured ltothe upper ends of necks 21. The armsfof the head 9.2 communicate with the respective outlet necks 21 which define the outletr or discharge openings o-f the pump. Three water supply pipes 23 are secured to the upper'ends of the arms of head 22, the upper endsv of these pipes being secured to and opening into water jacket 2a at a plurality of points or Zones thereof.

Y The pump may be of any suitable or preferred construction.` For pur-poses of illustration I'have shown a rotarytype of pump well knownin the art. This pump includes a rotor '24 'which is disposed within the pump The water is. suppliedV to casing eccentrically thereof. This rotor carries a pair of blades or vanes 25 which are spring pressed and Contact the circumferentia-l wall of the pump casing in the rotation of rotor 24. j The inlet opening 26 of each casing 18 communicates with the nozzle 9b so that water from the lower portion'of Vthe radiator 7 is supplied to all of the pumps equally. The rotors 24 of the Vpumps Vare feathered .upon or otherwise secured to, apump shaft A27 which extends through the pump casing as illustrated. This shaft 27 is connected by a suitable coupling 28 to shaft 29 of a generator 30 -whichis drivenwin n a known manner, through a suitable gear train, from the crank shaft of the engine.

In the operation of the engine, the water is withdrawn from the lower portion of the radiator? and is supplied tothe water jacket Qa through'the pipes 23, at a .pluralityY of points or Zones. It is to be particularly noted that the cooling water is supplied to the water jacket at each point under pressure, the pump` or other. suitable pressure generating means for supplying the water to any one point'or zone of the water jacket being indeh pendent Vof thev pumps for supplying the water to the other zones of the water jacket. VAs a result,rany back pressure or interference which may occur at one point or zone of sup? ply of Water will not adversely affect the sup-v ply of' Water to any other vzione or point. Proper supply of water to the various zones of the water jacket, and proper circulation of such water, is thus assured at all times.,

In the formillustrated in Fig. 1, the pumps 10 are shown as of the rotary type illustrated in Figs. 2, 3 and 4. y f

While I have shown, by way of example, a pump having aseries of -im'pellers mounted upon a common shaft, I do not limit myinvention to this particular form of pump. y It ispossible to obtain satisfactoryl results by using va'pu'mp structurev having lindependent impellers, or independent pumps or -the equivalent thereof may `be utilized to force the cooling water through independent conduits or pipes leading to individual cylinders or groups of cylinders.V K

What I claim is 1. In combination, an internal combustion engine having aplurality'ofcylindera a common water jacket surrounding the cylinders, a source of supply of cooling water, and means for delivering water Vfrom said source of supply to the water space about the cylinders at a plurality of points and under pressure, the water being deliveredat each of said points independently Y Y 2. In combination, an internal combustion engine having a pluralityof cylinders, a com mon water jacket surrounding the-cylinders, a radiator, a water return pip'econnecting the water acket to the radiator adjacent the top thereof, and means for pumpingwater from i pressure and independently.

the lower portion of the radiator and delivering it under pressure to the water space about the cylinders at a plurality of points, the water being delivered at each point independently. Y

3. In combination, aninternal combustion engine having a plurality of cylinders, a common water jacket surrounding the cylinders, a radiator, a water return pipe connecting the water jacket to the radiator adjacent the top thereof, and means for delivering water from the radiator to the water space about the cylinders in different zones thereof, the .j water being delivered tov each Zone under 4, In combination, an internal combustion engine having a cylinder block comprising cylinders and a common water jacket' enclosing the same, a radiator, a return water pipe connecting the upper portion of the water jacket to the upper portion of the radiator, a plurality of pumps having their in# takes connected to the lower portion ofthe radiator, and water supply pipes connected to the discharge openings of the respective pumps and opening into the water jacket.

5. In combination,- an internal combustion engine having a cylinder block comprising cylinders and a common water jacket enclosing thel same, a radiator, a return water pipe connecting the upper portion of the water jacket to the radiator, a plurality of pumps having their intakes connected to the lower portion of the radiator, a common drive shaft for said pumps, and water supply pipes connected to the discharge openings of the respective pumps and to the water j acket'at different portions thereof.

6. In combination, a multi-cylinder internal combustion engine, a water jacket surrounding the cylinders, a radiator, a water return pipe connecting the water jacket at points adjacent the respective cylinders to the radiator adjacent the top thereof, and means for delivering the water under pressure from the radiator to the water jacket at a plurality of points adjacent the respective cylinders, said means acting to deliver the Water to the respective points of the water jacket independently.

7. In combination a multi-cylinder internal combustion engine, a water jacket surrounding the cylinders, a radiator, a water return pipe connecting the water jacket adjacent each end and the center thereof to the radiator adjacent the-top thereof, and means for delivering water under pressure from the radiator to the water jacket adjacent both ends and the center thereof simultaneously and independently.

8. In combination, an internal combustion engine including water jacketed cylinders, a source of supply of cooling water, a pump assembly including a plurality of individual pump units, and independent conduits conengine including water jacketedcylinders, a

source of supply of cooling water, ya plurality of vindependent conduits communicating aty a plurality of points with the water spacev about the cylinders, and pressure means for delivering water from said source of supply to the respective conduits, said means deliver- `f" ing to each conduit independently of the other conduits.

In witness whereof, I hereunto subscribe y my name this 12th day of October, 1928. A

. JAMES B. FISHER, 

